Kitchen stove ventilator



Feb- 5, 1952 w. A. PLEDGER KITCHEN sTovE VENTILATOR 2 SHEETS- SHEET l Filed May 7, 1948 INVENTOR. W/LL/AM A. PL EDqER.

BY MMM H/s n rTofaNEY Feb 5, 1952 w` A. PLEDGER 2,584,613

KITCHEN STOVE VENTILATOR Filed May '7, 1948 2 SHEETS--SHEET 2 INVENTOR. 5 WILL/AM A PLELqEe BY www# H/S A TTOKNEY Patented Feb. 5, 1952 UNITED STATES PATE NT O F F I CE SIE- OVE VENTI-@TQ3 William-A. Pledger; San lrancisco,,(Ljalii'gY ApplicationMa-y 7, 1948, Serial No. 25,561 4 Glaims. (CL, 12B-2,9m

invention relates te a, kitchen steve ven.- tilater-4 v The. object. of. this. invention isto previdee kitchen. stove ventilator adapted te drew het air odors,b evaporations and' products ofcombustion v from the kitchen stove directly into said device wherein said hotV ai', odors, evaporatioiisand productsv of combustion are passed through a lter in which greaseandmoisture are condensed and' the air is expelled: through a fine into at mosphere. Y

Anotherobject of this invention isto provide a device of' the type described which ienoiseiess, vibration-less, and draws-in and expelrls sufficient volnmeoi air; to ta-Ke care of odors, evaporat'ons and products of' combustion produced icyv cocking.

Another object of the invention iste: prov-ide a Ventilator of the type described havinga ley-pass valve in a flue, which valve stays open whilel the ventilator is inoperative thereby providing.A an open path for escaping gas and products of combustion.

Another object of this. invention isv to provide a ventilator having, in addition to the above mentioned by-.pass valve, an automatic. damper which also stays open when the ventilator is not` in operation to. provide an air passage from an oven to the ue, which passage is partially ref stricted when the ventilator is in operation.

Other objects and advantages will appear-as the speeication proceeds andV the. particular features of the invention will be specifically pointed' out in thev appended claims.

Mydevice. is illustrated in the accompanying drawings in which:v

Fig. 1 is a front View of the device.

Fig. 2 isv aside. elevation oftheidevice'some 'parts being` shown in section.

f meetelt, my eitehenstere, ventileteraeenerallr indicated et: l... is used in connecten with e: kitchen steve. 2 which, has one two-.Qwest l to.. star' @tiered when ven .air blowing urlit- 9. Starts t0.: Qeerete.

its tense.-

te.4 lerende, .e s

therein.. '1L-hew ventilator: t: 1S ereferatlv placed between the stove, 2 y andthewall 5, a space which the law usually prescribes Should Seperate a stove tromwaltfer the-purpese ofy preventing tires.

The ventilator l is a hollow box-like strnctnre, nrefereblsmede ef. sheet iron and. Consisting ef ey need e. abeety 1 Supporting the treed t. and en blowing unit S providing forced draft trough the ventilator. The head 6 is. comprised ofa flat horizontal top l l a vertical baci; I2, rides it, andv e front. well, t4.. The front. ef. the he d` t. is. termed, into. erneut.. lt by. e. heed li' te, @ne from 1re. t0n Lt to Whiehftis hir-leed, et La, heetl has sides. H91 integral. therewith which slide in and, out. ef. the heed- Whenever the hood is closed, o r opened assl'imvn-v inrFig. 5. f

SIA-eut t t. extends over and. etere the Steve 2.

lower side. Qf. the.. Spent. le, arranged et enelereletionte. the'tep ef: the. steve 2. and is. covered by esuitalele lter. 2.9 which rests. 011 arlilter treme 2.2,.. filter 20 extends from ene side Qt'the. s pout It. t0 the other and'. fer cemenience of: hertellirlg= preferably Consists.. 0i' three sentirete pieces arranged Side ey Side..Y The filter 2t; is. especially designed; te tendente grease and evaporations from air passing through it. Integral with the frame 22;, there is a trough 23 formed at the bottom of` said frame. The back wall 2A ofj said trough is provided with prongs 25, which serve asabutments forv the lower ends of; said filters. The trough 23 eig-tends the length of said ventilator l and rests on a front Wall- M thereof to which` it is fastenedn by a plurality of brackets I5.

Fumes,4 hot air, evaporations and grease emanating from the topv 215- ot the. stove. 2i are drawn upwardly toward and 'through the iit'er Bt wherein grease and evaporations'settle and gravtatetherefrom into the trough 23.

The hood H1 may-l be. opened byy swinging it up- Wardly as shown in Fig". 5 and the lter 25, ref moved for cleaning purposes or. inspection.

The head 6 has two bottom sides 2, which are inclined towardy the center and each off them has an automatic. dam-perl5 arranged therein The latter-'consistsGradisca@ hinged at 3Q: above its central line and has an adjustable balancerl te; which is: se adjusted este. p dise 29 Qseretien and te close automatically whe-r1 the es Etief3 the dise 2.2. is trimmed., er the betten end Slet 3.4. be

@liteit cenneets seid dameerfw the/eren, t The-slots @t between thecitse 2.9. and. the frame 33 are of such size as to withdraw undesired fumes and hot air from kthe oven 3 in sunicient quantities when the forced draft is in operation without unduly cooling said oven.

The top of the body 1 is integral with the head 5, and its lower portion is divided into two legs 35 to straddle the air blowing unit S. The body consists of the front wall I4, the back i2. and sides 33 which connect with the sides i3.

There are two vertical partitions 3e extending through the body 1 by which it is divided into two'side passages 45, connected with the head 6, and a central passage 4i which enters the head 5 and forms therein a iiue 42. The lowerl portion of said central passage is split into two blower passages 45, each latter passage being arranged in a leg 35.

A pair of automatic valves 44 is arranged in the flue 42 in the head 6. The valves 44 are the same construction as the automatic dampers 28, except that the disc 48 closely fits thevalve frame 46. The valves 44 remain open when there is no forced draft in the ventilator and automatically close when the air blowing unit 9 starts to operate.

If some cooking is done on the top of the stove 2 while the ventilator i is inoperative, a considerable portion of the hot air fumes and evaporation rising from the stove will pass through the ventilator into the head E and through the open automatic valves 44 into the ue 42. Fumes and hot air from the oven 3, when the ventilator l is inoperative, will pass through the pipe 34, the open automatic damper 28 into the head 6 and through the open automatic valve 44 into the ue 42.

Fig. 9 shows a modified form of the automatic damper in which a disc 1U tightly fits a frame 'H of said damper, said disc being rotatably supported by hinges 12. A hole 14 is provided in said disc which hole may be closed partially or completely by a slide 15 attached to said disc by a rivet 16. The hole 14, when the automatic damper is closed and the ventilator I is in operation, permits sufficient amount of air to be drawn from the oven 3 to prevent fumes and odors from spreading in the kitchen.

The air blowing unit 9 consists of an electric motor 5G, centrally located between'the legs 35 and having a shaft 5| extending on both sides of said motor. Each end of said shaft 5l carries a rotary blower 52 enclosed in a scroll 53 attached to a leg 36. The scroll 53 opens into the blower passage 45.

The side passages 40 terminate at the center of the scrolls 53 wherein openings 54 are provided in the side thereof. The blowers 52 are so rotated that air is drawn from the head 6 downwardly through the side passages 40, the openings 54, into said blowers, and therefrom is forced upwardly into the blower passages 45, central passage 4I and the flue 42.

The partial vacuum in the head 6 forces air around the stove 2 to move upwardly and into the spout l5, through the lter 20 and into said head.

The air moving into the spout I6 envelops the stove 2 completely, thus preventing fumes, grease and odors spreading in the kitchen and penetrating the other rooms in the house.

The motor 50 rests on a wooden frame 55 consisting of a plurality of wooden planks nailed and glued together. The motor 50 and the blowers 52 do not contact the scrolls 53 or any other part of the ventilator, as the motor shaft 5I passes through the holes 55 in the walls of the legs 35 without contacting the same. The legs 35 rest on the frame 55 and are attached thereto by bolts 51. This arrangement eliminates vibration and consequent noise of the ventilator body.

The body 1 of the ventilator is made narrow to fit the space between the stove '2 and the wall, which space is only about 6 wide. The motor 5U and the scrolls 53 are of somewhat bigger diameter than 6, and for that reason are arranged to protrude forwardly to occupy an empty space 58 back of the stove 2. The back of the ventilator i is straight so that the same may be set flat against the Wall. The ventilator i may be built in a wall if so desired, with the spout and hood overhanging the stove.

The ventilator I is also supported by two side supports B0 extending from the head to frame extensions Si detachably attached to the frame 55. The support 60 has a ange 63 formed into a slot into which an apron 54 in the form of a metal sheet is slid. The apron 54 extends from the trough 23 downwardly below the top surface of the stove 2 to cover the ybody of the ventilator.

In order to insure efficient operation of the ventilator it is necessary that certain amounts of air be. expelled from the kitchen every minute. It has been found by experiments that a single blower is insufcient to handle the desired quantity of air per minute in the device which is about G deep and expel said air through a standard flue which is about 6 in diameter. Two blowers driven by a single motor are sufficient to expel the desired amount of air from the kitchen,v and to overcome the considerable static pressure in the flue caused by forcing a large volume of air therethrough.

I claim:

1. A Ventilating device for a cooking stove, said device comprising a head; a spout extending away from the front of said head and having an open lower side; afilter adapted to condense grease and evaporations from air passing therethrough, said filter being arranged in the open lower side of said spout; a motor and a blower operated thereby; means forming a passage from said head to the blower fordrawng air from the former to the latter; means forming an air passage from said blower; a flue connected with the last mentioned means and passing through said head into the atmosphere; an automatic valve arranged in the wall of the flue inside of the head, which valve is adapted to stay open when the blower is inoperative and to close when the same is in operation; and an automatic damper arranged in the head and adapted to stay open when the blower is inoperative and to have a restricted opening when theblower is in operation.

2. A Ventilating device for a cooking stove, said device consisting ofa head, a spout extending away from the front of said head and having an open lower side; a filter for condensing grease and evaporations from air passing therethrough, said lter being supported in the open lower side of the spout; a motor and a blower operated thereby, means forming a passage from said head to said blower for drawing air from the former to the latter, means forming a passage from said blower, a iiue connected with the last mentioned means and passing through said head for passing air from said blower to thev atmosphere; and an automatic. valve in the wall of the flue inside rof the head which valve is adapted to stay open when the blower is inoperative.

3. The combination of a stove having a cooking surface With a Ventilating device consisting of a head above said stove; a spout extending away from the front of said head and having an open lower side above the cooking surface; a iilter for condensing grease and evaporations from the air passing therethrough, said lter being mounted in the open lower side of the spout and directly facing the cooking surface; a motor and a blower operated thereby; means forming a passage from said head to said blower; and a flue connected with the last mentioned means and passing through said head for passing air from said blower to the atmosphere.

4. The combination of a stove having a cooking surface and an oven with a Ventilating device comprising a head above said stove; a spout extending forwardly from said head and over said cooking surface and having an open lower side; a filter for condensing grease and evaporations from the air passing therethrough, said filter being mounted in said open lower side and facing directly the cooking surface; a motor and a blower operated thereby; means forming a passage from said head to said blower for passing air from said head to said blower; means forming a passage from said blower; a iiue con* neeted with said second mentioned means and passing vthrough and outside of the head; an automatic valve mounted in the wall of the ue inside of said head which valve is adapted to stay open when the blower is inoperative and to close when the blower is in operation; an automatic damper mounted in the wall of the head and adapted to stay open when the blower is inoperative and to have a restricted opening when the blower is in operation; and a pipe connecting said oven with said damper.

WILLIAM A. PLEDGER.

REFERENCES CITED The following references are of record in the 'die of this patent:

UNITED STATES PATENTS Number Name Date Re. 22,228 Petersen Dec. 1, 1942 217,353 Erdman July 8, 1879 697,976 Amos July 26, 1898 1,477,590 Powell Dec. 18, 1923 1,671,524 Gerdes May 29, 1928 1,732,315 Ray Oct. 22, 1929 2,359,375 Sonntag Feb. 13, 1945 2,398,508 Shoemaker Apr. 16, 1946 2,417,842 Sanford et al. Mar. 25, 1947 2,482,952 Narren Sept. 27, 1949 2,494,146 Spanos Jan. 10, 1950 2,525,614 Nelson et al. Oct, 10, 195) FOREIGN PATENTS Number Country Date 379,160 Great Britain Apr. 7, 1932 

